100043553205 has 4 divisors (see below), whose sum is σ = 120052263852. Its totient is φ = 80034842560.

The previous prime is 100043553179. The next prime is 100043553217. The reversal of 100043553205 is 502355340001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502355340001 = 149 ⋅3371512349.

It can be written as a sum of positive squares in 2 ways, for example, as 16595365329 + 83448187876 = 128823^2 + 288874^2 .

It is a de Polignac number, because none of the positive numbers 2^k-100043553205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10004355316 + ... + 10004355325.

It is an arithmetic number, because the mean of its divisors is an integer number (30013065963).

Almost surely, 2^100043553205 is an apocalyptic number.

It is an amenable number.

100043553205 is a deficient number, since it is larger than the sum of its proper divisors (20008710647).

100043553205 is an equidigital number, since it uses as much as digits as its factorization.

100043553205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20008710646.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 100043553205 its reverse (502355340001), we get a palindrome (602398893206).

The spelling of 100043553205 in words is "one hundred billion, forty-three million, five hundred fifty-three thousand, two hundred five".